High-temperature Alloy Technical Data

Oxidation Resistance of High-temperature Alloys

The following results were generated for standard burner rig high-velocity dynamic oxidation tests. Exposures were 1000 hours at 1800°F (980°C). Samples were exposed in a rotating carousel to products of combustion of a mixture of No. 1 and No. 2 fuel burned at an air: fuel ratio of about 50:1. Gas velocity was 0.3 Mach. Samples were automatically removed from the gas stream every 30 minutes, and fan cooled to under 500°F (260°C). Following exposure, samples were evaluated metallographically to determine the extent of metal loss, or thinning, and the average depth of internal penetration. Average metal affected is the sum of these quantities.

Oxidation in Flowing Air

The following results were generated for 1008 hour exposures to gently flowing air in a tube furnace. Samples were cycled to room temperature once-a-week. Following exposure, samples were evaluated metallographically to determine the extent of metal loss, or thinning, and the average depth of internal penetration. Average metal affected is the sum of these two quantities.

Alloy

Average Metal Affected**

1800°F (980°C)

2000°F (1095°C)

2100°F (1150°C)

2200°F (1205°C)

-

mils

µm

mils

µm

mils

µm

mils

µm

214®

0.2

5

0.1

3

0.3

8

0.7

18

230®

0.7

18

1.3

33

3.4

86

7.9

201

S

0.5

13

1.3

33

1.7

43

>31.7

>805

188

0.6

15

1.3

33

8.0

203

>21.

>551

600

0.9

23

1.6

41

2.9

74

8.4

213

617

1.3

33

1.8

46

3.4

86

12.5

318

310

1.1

28

2.3

58

4.4

112

10.3

262

556®

1.1

28

2.6

66

11.6

295

>150.0

>3810

601

1.3

33

2.6

66

5.3

135

7.5*

191*

X

0.9

23

2.7

69

5.8

147

>35.4

>899

150

1.0

25

3.8

97

>26.8

>681

>46.1

>1171

625

0.7

18

4.8

122

18.2

462

>47.6

>1209

RA330

4.3

109

6.7

170

8.7

221

-

-

800H

1.8

46

7.4

188

8.9

226

13.6

345

HR-120®

3.7

94

7.7

196

16.3

414

25.3

643

253MA

2.9

74

8.2

208

16.4

417

29.2

742

25

0.7

18

10.2

259

19.2

488

>37.9

>963

HR-160®

5.9

150

10.3

262

13.0

330

24.2

615

MULTIMET®

1.3

33

11.6

295

>47.2

>1199

>146.4

>3719

800HT

3.8

97

12.0

305

18.8

478

>58.0

>1473

446

2.3

58

14.5

368

>21.7

>551

>23.3

>592

304

8.1

206

>27.1

>688

>23.6

>599

>68.0

>1727

316L

14.3

363

>68.4

>1737

>105.0

>2667

>140.0

>3566

* Large internal voids not included

** All figures shown as greater than stated value represent extrapolation of tests for which samples were consumed in less than 1008 hours.